Cranking Simulator Reference Design for Automotive Applications


Design files


This design is a cranking simulator which generates three different cranking pulses to test automotive systems up to 50W. A microcontroller sets the output voltage of a synchronous buck in the range of 2-15V accordingly to the programmed curves. Output current is in the range of 3.3-25A. It is a complete system and all the information necessary to build the device is available.

  • Device has transient protection that withstands up to 62V spikes on Vin and enables design flexibility
  • Device responds almost immediately to line transients with better than 1% regulation on output
  • Voltage tracking reduces external components saving board space
  • Logic device supports live insertion, partial power down mode and back drive protection
  • Losses minimized in power application

Output voltage options PMP7233.1
Vin (Min) (V) 20
Vin (Max) (V) 28
Vout (Nom) (V) 12.6
Iout (Max) (A) 4
Output Power (W) 50.4
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU143.PDF (2796 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR139.PDF (295 K)

Detailed schematic diagram for design layout and components

TIDR140.PDF (26 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC079.ZIP (207 K)

Design file that contains information on physical board layer of design PCB

TIDU144.PDF (55 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS401704.5 V to 60 V Wide-Input Synchronous PWM Buck Controller

Data sheet: PDF | HTML
Buck controllers (external switch)

TPS40170-Q1Automotive 4.5V to 60V Synchronous Buck Controller with Voltage Tracking

Data sheet: PDF | HTML
Buck converters (integrated switch)

LM28414.5V to 42V, 300mA SIMPLE SWITCHER® buck converter in thin SOT-23

Data sheet: PDF | HTML
Buck converters (integrated switch)

LM2841-Q1SIMPLE SWITCHER® 42V, 300mA Step-Down DC/DC Regulator in Thin SOT-23

Data sheet: PDF | HTML
Inverting buffers & drivers

SN74LVC1G14Single 1.65-V to 5.5-V inverter with Schmitt-Trigger inputs

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F227416 MHz MCU with 32KB Flash, 1KB SRAM, 10-bit ADC, 2 OpAmp, I2C/SPI/UART

Data sheet: PDF
N-channel MOSFETs

CSD18503Q5A40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.3 mOhm

Data sheet: PDF | HTML
Supervisor & reset ICs

TPS38093-pin voltage supervisor (reset IC) with active-low, push-pull reset

Data sheet: PDF | HTML

Start development


Technical documentation

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Type Title Date
Test report PMP7233 Test Results Sep. 05, 2013

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